Question 57Gas Turbine - Assistant Engineer
70% to passFor the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 2nd stage blades are cooled by convection, with the cooling air being discharged where? Illustration GT-0011
ANose holes on the leading edge.
BGill holes on the side.
CTrailing edge slots.
DBlade tips.
AI Explanation
The correct answer is D) Blade tips. The HP (high-pressure) turbine 2nd stage blades in the GE LM2500 gas turbine engine are cooled by convection, with the cooling air being discharged through the blade tips. This design allows the cooling air to flow over the blade surfaces, effectively dissipating heat and improving the engine's overall efficiency. The other answer options are incorrect because: A) Nose holes on the leading edge are not used for cooling the HP turbine 2nd stage blades, B) Gill holes on the side are not the discharge point for the cooling air, and C) Trailing edge slots are not the location where the cooling air is expelled.
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